class Arrays {

    /**
     * @private
     */
    this.Arrays = function() {
        throw new Error('Arrays class cannot be instantiated!');
    };
}

/**
 * @public
 * @param arr1 {Array}
 * @param arr2 {Array}
 * @return {Boolean}
 */
Arrays.equals = function(arr1, arr2) {
    if (arr1.length !== arr2.length) {
        return false;
    }
    for (var i = arr1.length; i--;) {
        if (arr1[i] !== arr2[i]) {
            return false;
        }
    }
    return true;
};